Internal-combustion engine



Dec- 1930. o. R. SCHOENROCK 1,785,146

I INTERNAL COMBUSTION ENGINE Filed April 20. 1929 2 Sheets-Sheet l Dec. 16, 1930. o. R. SCHOENROCK 1,785,146

INTERNAL COMBUSTION ENGINE 2 Sheets-Sheet 2 Filed April 20, 1929 w/// H V 02/0 E 56%06/2 X061 [7' 61/4 V Patented Dec. 16, 1930 STAES FAENT OFlCE Application filed April 20,

The present invention relates to improve ments in internal combustion engines, and has particular reference to new and improved cooling means therefor.

One of the important features of internal combustion engine construction resides in the means for cooling the cylinders, the valves and the inlet and exhaust conduits. The form of this means varies with difi'erent types of engines. Thus for valve-in-head mlgiines it is common to provide a water jacket about the cylinder, and also a water jacket for the head closing the end of the cylinder. Usually, these j ackets are in communication, and are connected through inlet and outlet pipes to some source of cooling Water, such as automobile radiators.

ln multi-cylinder en "nes, particularly where the cylinders are aligned side by side, one of the biggest difiiculties has been the uniform distribution of cooling water so as to maintain the difierent cylinders substantially at the same temperature. Ordinarily, the water inlet is provided at one end of the cylinder block, and the water outlet is located at the other end. As a result, the water at the dischar e end is much warmer than at the inlet end The primary object of the present invention resides in the provision of novel means for distributing water from the inlet unitormly to all the cylinder heads of a multicylinder engine.

A more specific object resides in the provision of novel means of this character which comprises a single straight distributin pipe extending the length the cylinder lilock, and having discharge orifices for discharging a jet of water against the valve casing and the inlet and exhaust conduits of each cylinder, and which is readily removable from the engine block so as to permit ease of assembly and cleaning.

Various general objects reside in the provision of a water distribution pipe of novel 1929. Serial No. 858,815.

shape and construction which simplifies foundry construction,

which produces a better distribution than has been possible heretofore, which insures an adequate supply of water so as to prevent boiling, and which has openings of the pro er size that will not clog readily and can be liept clean.

Further objects and advantages will become apparent as the description proceeds.

In the accompanying drawings, Fig. 1 is a fragmentary plan view of an internal combustion engine embodying the features of my invention.

Fig. 2 is a fragmentary side elevation.

Fig. 3 is a fragmentary sectional view so taken along line 33 of Fig. 1.

While the invention is susceptible of various modifications and alternative constructions, l have shown in the drawings and will herein describe in detail the preferred embodiment, but it is to be understood that I do not thereby intend to limit the invention to the specific form disclosed, but intend to cover all modifications and alternative constructions falling within the spirit and scope of the invention as expressed in the appended claims.

Referring more particularly to the drawings, the engine embodying the exemplary embodiment of the invention comprises four parallel aligned cylinders 10, but it is to be understood that the invention is applicable to various engines of diiferent construction and having difierent numbers of cylinders. The cylinders 10 constitute an integral engine block which is provided with a peri heral water jacket 11 defining a water cham or 12 common to all of the cylinders. Removably mounted on the cylinder block is a unitary head structure 13 closing the upper ends of 86 the cylinders 10. The head structure 13 is formed with a suitable water jacket 14 defining a water chamber 15 also common to all of the cylinders 10. The chambers 10 and 15 are in communication through suitable I0 passages 16 formed in the contacting walls of the block and the head structure.

The head structure 13 also is formed with inlet and exhaust conduits 17 and 18, the inner ends of which constitute valve casings for valves 19 and 20 respectively for each cylinder. These conduits are surrounded by the water chamber 15.

The valves are most subject to overheating, and overheating thereof is most likely to interfere with the satisfactory operation of the engine. Hence, I provide novel means for supplying cooling water directly to the chamber 15 in the head structure 13. The cylinder walls will be kept sufiiciently cool by the convection of water between the chambers 12 and 15. This means comprises a water distributing pipe 21 removably inserted through an opening 22 in one end of the head structure 13 and extending longitudinally thereof to the other end. The pipe may be of any suitable form, and preferably is straight and is rectangular in shape with the long dimension disposed vertically. Preferably, the pipe is made of sheet metal, such as copper. The inlet end of the pipe 21 is adapted to be connected to a suitable water supply (not shown), and the other end is closed.

The pipe 21 is formed along its length with a plurality of discharge openings 23. Preferably, one relatively large opening 23 for each cylinder is provided, and this opening is formed in the lower corner of the pipe 21 adjacent the conduits 17 and 18 to direct a jet of water toward the latter. Suitably sized openings 23 must be provided to roduce a uniform distribution of water an yet' discharge suflicient water to prevent boiling. Provision of openings of the propersize is possible by reason of the pipe 21 being removable. The openings 23 being relatively large in size do not clog readily, and can be cleaned conveniently by removing the pipe 21. By reason of the location of the pipe 21 in the head structure, cooling water is uniformly directed to the places where most needed. The construction also is simple and inexpensive, and simplifies foundry practice. Since the pipe is made of sheet metal instead of being cast separately or integrally with the head structure, no fins are present.

The head structure 13 is formed with a plurality of outlet openings 24 substantially opposite the openings 23 and through which t e chamber 15 communicates with a suitable water discharge manifold 25. Thus, the cooling water is not required to traverse the entire length of the block. By reason of the uniform distribution of water, the engine stipcture is cooled uniformly from end to en I claim:

1. An internal combustion engine comprising, in combination a cylinder block with a plurality of parallel ali ed cylinders and a water jacket about sai cylinders, a head structure on said block, said head structure havin a water 'acket extendin the length of said b ock, sai water jackets eing in communication, valve conduits in said head structure, a sheet metal water distribution pipe removably inserted in one end of said head structure and extending through said head water jacket to the other end thereof, said pipe being rectangular in cross-section with the long dimension disposed vertically and bein formed with large discharge openings, one or each cylinder, 1n its lower corner adjacent said valve conduits to direct cooling water toward the latter, and a water take-o manifold having a plurality of branches one opening to said head jacket in the region of each cylinder.

2. An internal combustion en 'ne comprising, in combination, a cylinder lock with a plurality of parallel aligned cylinders, a head structure on said block, said head structure having a water jacket extending the length of said block, valve conduits in sa1d head structure, and a water distribution pipe removably inserted in one end of said head structure and extending through said water jacket to the other end thereof, said pipe being formed with large discharge openings, adjacent said valve conduits to direct cooling water toward the latter.

3. An internal combustion on me com rising, in combination, a cylinder lock with a plurality of c linders, a head structure. on said block, said head structure having a water jacket, and a sheet metal water distribution pipe removably inserted in said head structure and extending through said water jacket, said pipe bein rectangular in crosssection with the long imension dis osed vertically and being formed with arge discharge openings.

4. An internal combustion engine comprising, in combination, a multi-cylinder structure, a head structure thereon, said head structure bein formed longitudinally with a water cham er, valved conduits in said chamber, a removable distribution ipe extending longitudinally through sai chamber and along one side thereof, and means extending along the other side of said head and externally thereof, said last mentioned means havin branches opening at spaced points to sai chamber.

5. An internal combustion engine comprising, in combination, a multi-cylinder structure, a head structure thereon, said head structure bein formed longitudinally with a water cham er, valved conduits in said chamber, and an elongated distribution ipe removably mounted in said chamber an extending longitudinally thereof, said pipe being perforated along its-length.

till

6. An internal combustion engine comprising, in combination, a multi-cylinder structure, a head structure thereon, said head structure being formed l-on 'tudinally with a.

water'chamber, valved con nits in said chamber, and an elongated distribution pipe removably mounted in one end of said head, extending longitudinall through said chamber, and anchored in t e other end "of said head, said pipe having spaced openings along its length for directing streams of cooling water toward said conduits.

In testimony whereof, I have hereunto affixed my signature.

OTTO R. SCHOENROCK. 

